I just bought this Phal a week ago and after two days it has dropped a bottom leave. After reading around on this forum, I discovered that this can be pretty normal.
However, as you can see in attached pictures I noticed a second leave become leathery in anticipation of dropping too. So I suspect this to be due to some root rot.
I would like to take it out of its pot to confirm my suspicion, but there is where you come in:

The Phal is currently in bloom; so should I wait until it is finished blooming to check the roots, with possible re-potting activities?

thanks for your usual advise.
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